Elevator attachment.



' No. 743,258. I .PATENTBD NOV. s, 1903. I w. H. DOLBEY.

ELEVATOR ATTACHMENT.

V APPLIOATION FILED MAR/l4, 1903.

H0 MODEL. 2 SHEETS-SHEET 1.

Q/Vihmana V 4 I m: nonms vcnzas 00.. moYmJmuJ/Asmmwm n, cy v No. 743,258. PATENVTBD NOV. 3, 1903. w. H. DOLBEY.

ELEVATOR ATTACHMENT.

APPLICATION FILED MAR. 14, 1903. no MODEL. T 2 smmssnnm 2.

wlliem Do1be-x1 wa I ammo 1 //MWW UNITED STATES Patented November 3, 1903.

WILLIAM H.DOLBEY, OF AUBURN, NEW YORK.

ELEVATOR ATTACHM ENT.1

SPECIFICATION forming part of Letters PatentNO. 743,258, dated November 3, 1903.

Application filed March 14, 1903. Serial No. 147,811. (No model.)

To all, whom, it may concern:

Be it known that 1, WILLIAM H. DOLBEY, a citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented new and useful Improvementsin ElevatorAttachments,of which the following is a specification.

This invention relates to elevator-cars, but more particularly to a safety device therefor; and one of the objects is to provide an efficient construction of safety device which can readily be applied to a car, so as to engage the guides therefor in the event of an emergency.

Another object is to provide a simple construction of safety device which can be appliedto elevator organizations ofordinaryconstruction without materially altering them.

With these objects in view the invention consists in certain novel details of construction and combination of parts to be specifically referred to hereinafter and illustrated in the accompanying drawings, in which- Figure l is a perspective view of a portion of an elevator-shaft, showing the car applied thereto and equipped with a safety device embodying the essential features of this invention. Fig. 2 is a vertical cross-sectional view through the car equipped with my improved safety device. Fig. 3 is a side elevation of the engaging dogs and the equipping mechanism detached. Fig. 4 is a detail-view of the friction-spring for the controlling-lever, and Fig. 5 illustrates a modified form of the guide-engaging means.

1 1 designate two vertically-arranged parallel guides of'ordinary construction usually found in the common form of elevator-shafts, and these guides are equipped with inwardlyprojecting oppositelydisposed racks 2 2, which engage grooves formed in the standards 3 3 of the car 4. A cross-beam or member 5 connects the upper extremities of the standards 3 3 and is preferably hollow, forming a housing for the operating mechanism, to be more specifically referred to hereinafter. Slots 6 extend through the standards and are in alinement with the teeth of the racks 2 2, and intermediate the ends of the slotsare j ournal-bearings 7 7, in which are located the pivoted pins or journals 8 8 for the engaging levers 9 9. It will be noticed that the levers arm 11.

are counterparts of. each other and are journaled intermediate their ends. The portion below the fulcrumof each lever constitutes a dog having at its lower extremity a toe 10 for engagement with the teeth of one of the racks. The portion of the lever above the fulcrum is curved toward its extremity, forming an As illustrated in Fig. 3, the levers are oppositely disposed and their upper extremities extend above a horizontally arranged bar12, the ends ofwhich are connected to the respective levers by links 13 and 14. This bar 12 forms a part of a vertically-sliding head 15, mounted in the cross-beam 5, the upward movement of which is limited bya flange or collar 16 near the lower end thereof. The upper end of the head 15 terminates in a restricted portion 17, which forms a shoulder 18, against which one end of a coil-spring 19 hears. The opposite end of the spring bears against the top bar 20 of the cross-beam 5, so that the normal tendency of the head is in a downward direction. A hoisting-cable 21 is connected in any convenient manner to the restricted portion 17 of the head 15, and as the cage is drawn upward the head will be retracted within the hollow portion of the beam, moving the bar 12 in an upward direction, and through the medium ofthe links 13 and 14. the upper extremities of the levers 11 will be forced in opposite directions toward the.

guides 1 1. By imparting this movement to the lovers the toes 10 will be withdrawn from contact with the rack-teeth, permitting the car to be hoisted. When, however, the car stops or a slack occurs in the hoisting-cable 21, the expansive force of the spring 19 will be sufficient to project the head through the opening in the beam 5 or impart a downward movement thereto, which movement will be communicated to the bar 12, thereby drawing the upper extremities of the levers 11 toward each other or away from the racks 2 2. Simultaneously with this movement the toes 10 of the levers 11 will be shot into contact with the teeth, thereby holding the car from falling. A manually-actuated operating mechanism is also provided whereby the levers can be controlled by the conductor of the cage or car to which the safety device is applied. This mechanism consists of a lever 22, pivoted intermediate its ends to the beam 5 and having its free end extending through a slot 23 in the head 15. The opposite end of the lever is connected to a controlling-lever 24 by aconnecting-rod 25. The controlling-lever 24 is pivoted at one end to a standard 26, projecting from the floor of the cage or car. This lever can be held in any determined position by an arcuate' tension-spring 27, adjustably connected to a bracket 28, secured to one of the standards 3 and controlled by tensionscrews 29 near the respective ends thereof. By turning the screws 29 the spring can be forced toward or away from an outer vertical strip forming part of the bracket, so as to increase or decrease the tension of the spring 27 against the lever 24. It will be observed that this spring 27 constitutes a friction-jaw adapted to hold the lever 2t when the free end is in depressed position to impart an upward movement to the latter of the lever 22, whereby the lever 7 will be drawn out of engagement with the racks 2 2. Thus the car will be permitted to slide freely within the guides, and the downward movement will not be retarded as long as the lever is held in its depressed condition. In the event of an emergency, however, the lever can be quickly raised, permitting the toes of the levers 7 7 to be shot into engagement with the teeth of the racks. By again depressing the lever the toes of the levers 7 7 can be promptly withdrawn.

In Fig. 5 I have illustrated a slightly-modified form of engaging means, in which a wedge 30 is substituted for the toe of the lever, said wedge being pivoted to the lower extremity of each lever and carrying the teeth or spurs 31 on its engaging surface, which' are provided for the purpose of engaging the guides where they are not provided with racks. In certain elevator organizations the guides are provided with grooves instead of racks, and in this class the wedge-shaped shoe 30 will be preferred to the engaging means shown in the remaining figures. However, the actuating and controlling mechanism will be identically the same as employed in the preferred form, although the lever, which is designated by the reference-numeral 9*, will be slightly modified to accommodate it to the construction of the wedge-shaped shoe 30.

Having thus described the invention, what is claimed as new is- 1. The combination with a pair of guides, and a vertically-moving car between the guides; of a pair of oppositely-located levers,

means on the extremities of the levers for engagement with the guides to retard movement of the car, a spring-pressed verticallymoving head carried by the car, a horizontally-arranged bar carried by the head and arranged below the upper extremities of the levers, and link connections secured to the respective ends of the levers and to the ends of the bar whereby a reciprocating movement of the head will retract the engaging ends of the levers or project them against the guides.

2. In a safety device for elevator-cars, the combination with a pair of vertically-arranged guides, an elevator-car moving between the guides, pivoted levers carried by the opposite sides of the car, pivoted shoes carried by the ends of the respective levers and adapted to engage the guides to hold the elevator-car against movement, and a horizontally-disposed vertically-movable bar for operating the levers.

3. In a safety device for elevator-cars, the combination with a pair of pivoted levers, one end of each lever being adapted to engage the guides in the shaft, a vertically-moving head carried by the elevator-car, connecting means between the head and the levers, a pivoted lever, one end of which projects through an opening in the head, a second or controlling lever, and a connection between the controlling-lever and the lever engaging the head, whereby the levers for engagement with the guides can be retracted or projected to retard the movement of the car or permit it to move.

4. In a safety device for elevator-cars, the combination with a pair of oppositely-located guides, of a vertically-moving car therein, pivoted devices carried by the car for engagement with the guides, a vertically-moving head, a connection between the head and the devices, a pivoted lever in engagement with the head, a second lever, a connection between the first-named lever and second lever, and a spring friction-jaw arranged adjacent to the last-named lever and normally bearing against it, whereby the lever will be held in a depressed position to withdraw the engaging devices out of contact with the guides.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. DOLBEY.

Witnesses:

G. W. HUToHINson, FRED D. SEARLES.

iOO 

